2 * Copyright (c) 2019 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ethertypes.rev190304;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Verify.verify;
12 import static com.google.common.base.Verify.verifyNotNull;
14 import com.google.common.base.CharMatcher;
15 import java.util.Comparator;
16 import java.util.EnumMap;
17 import java.util.Objects;
18 import org.eclipse.jdt.annotation.NonNull;
19 import org.opendaylight.yangtools.yang.common.Uint16;
20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ethertypes.rev190304.Ethertype.Enumeration;
23 * Utility methods for dealing with {@link Ethertype}.
25 public final class EthertypeUtils {
26 private static final CharMatcher DIGITS = CharMatcher.inRange('0', '9');
27 private static final EnumMap<Enumeration, Ethertype> ENUM_ETHERTYPES;
30 final EnumMap<Enumeration, Ethertype> map = new EnumMap<>(Enumeration.class);
31 for (Enumeration value : Enumeration.values()) {
32 verify(map.put(value, new Ethertype(value)) == null);
34 ENUM_ETHERTYPES = map;
37 private EthertypeUtils() {
38 //Exists only to defeat instantiation.
41 // TODO: the canonical representation is undefined. We may consider turning integers into enum values, but at this
42 // point it would confuse people and would not work well with JSON/XML parser output.
43 public static @NonNull Ethertype getDefaultInstance(final String defaultValue) {
44 final int length = defaultValue.length();
45 if (length > 0 && length < 6 && DIGITS.matchesAllOf(defaultValue)) {
46 final int value = Integer.parseInt(defaultValue);
48 return new Ethertype(Uint16.valueOf(value));
51 // Fall through and interpret as a string
54 final var known = Enumeration.forName(defaultValue);
55 checkArgument(known != null, "Unknown ethertype %s", defaultValue);
56 return verifyNotNull(ENUM_ETHERTYPES.get(known));
60 * Semantically compare two {@link Ethertype}s based on their numeric value, according to
61 * {@link Comparator#compare(Object, Object)} contract.
63 * @param first First Ethertype
64 * @param second Second Ethertype
65 * @return a negative integer, zero, or a positive integer as the
66 * first argument is less than, equal to, or greater than the
68 * @throws NullPointerException if any argument is null
70 public static int compareValue(final Ethertype first, final Ethertype second) {
71 return Integer.compare(extractValue(first), extractValue(second));
75 * Determine semantic equality of two {@link Ethertype}s based on their numeric value, according to
76 * {@link Objects#equals(Object, Object)} contract. This is distinct from {@link Ethertype#equals(Object)}, which
77 * does not perform semantic comparison.
79 * @param first First Ethertype
80 * @param second Second Ethertype
81 * @return True if the two Ethertypes are equal, false otherwise.
83 public static boolean equalValue(final Ethertype first, final Ethertype second) {
84 return first == second || first != null && extractValue(first) == extractValue(second);
88 * Determine semantic hash value of a {@link Ethertype}s based on its numeric value, according to
89 * {@link Object#hashCode()} contract. This is distinct from {@link Ethertype#hashCode()}, which does not perform
90 * semantic hashing. Unlike {@link Objects#hashCode(Object)}, this method does not return 0 for null objects.
92 * @param value Ethertype object
93 * @return Specified object's semantic hashCode
95 public static int hashValue(final Ethertype value) {
96 return value == null ? 65536 : extractValue(value);
99 private static int extractValue(final Ethertype type) {
100 final Enumeration known = type.getEnumeration();
101 return known != null ? known.getIntValue() : verifyNotNull(type.getUint16()).intValue();